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dc.contributor.authorBennett, Samanthaen
dc.date.accessioned2020-09-01T21:46:40Z
dc.date.available2020-09-01T21:46:40Z
dc.identifier.urihttp://hdl.handle.net/1974/28088
dc.description.abstractTensile strains that occur in geomembrane liners that are induced by local gravel indentations are investigated, with an emphasis on how the strains are calculated and what testing methods are used to obtain the deformed shape of the geomembrane. This involved the use of established test methods and apparatuses but using a 3D laser scanner to obtain the deformed shape and a recently developed theoretical technique to calculate strain in a geomembrane. Full-scale geosynthetic protection efficiency tests were conducted to test the influence of subgrade on the geomembrane strains. The subgrades examined included no subgrade, a firm rubber pad and a compacted clay liner. The results showed that the tests with no subgrade and rubber subgrades significantly overestimated and underestimated, respectively, the strain in the geomembrane when compared to results from the compacted clay liner tests. Smaller-scale index tests were also conducted to determine the ability of previously developed single-point test apparatuses to simulate the maximum, rather than mean, strain found in a corresponding full-scale test. Two apparatuses machined to simulate the average response of nominal 25 and 50 mm gravels with a single gravel particle were tested. Results showed that the strains induced in the 25 mm cell tests should be multiplied by a factor of at least 2 to reach the maximum strain in the corresponding full-scale test. The effect of strain calculation method was also investigated, where it was shown that a strain of 6% calculated using an established method considering small-displacement-membrane plus bending effects but ignores large displacement effects from lateral displacements is closer to a “true” strain of 8% when radial displacements are included providing the first quantification of simplifying calculation assumptions for actual 25 mm gravel.en
dc.language.isoengen
dc.relation.ispartofseriesCanadian thesesen
dc.rightsQueen's University's Thesis/Dissertation Non-Exclusive License for Deposit to QSpace and Library and Archives Canadaen
dc.rightsProQuest PhD and Master's Theses International Dissemination Agreementen
dc.rightsIntellectual Property Guidelines at Queen's Universityen
dc.rightsCopying and Preserving Your Thesisen
dc.rightsThis publication is made available by the authority of the copyright owner solely for the purpose of private study and research and may not be copied or reproduced except as permitted by the copyright laws without written authority from the copyright owner.en
dc.subjectGeosyntheticsen
dc.subjectCivil Engineeringen
dc.subjectGeomembranesen
dc.titleAssessment of Local Strains in Geomembranes at Gravel Indentationsen
dc.typethesisen
dc.description.degreeM.A.Sc.en
dc.contributor.supervisorBrachman, Richard
dc.contributor.departmentCivil Engineeringen
dc.embargo.termsI am requesting that my thesis be restricted from released to QSpace, Library and Archives Canada, or Proquest, and copies of the thesis held by the School of Graduate Studies will not be bound, microfilmed, or deposited in any library. I am requesting that the thesis be restricted for the maximum allowed period of 5 (five) years. This restriction request is needed to permit time to prepare and submit the manuscripts for scholarly papers. My supervisor, Richard Brachman, entirely supports this request.en
dc.embargo.liftdate2025-08-31T23:35:28Z
dc.degree.grantorQueen's University at Kingstonen


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